CVE Feed

    Dashboard / CVE / CVE-2026-100665

    CVE-2026-100665

    Netty versions from 4.2.11.Final before 4.2.18.Final contain an incomplete hostname verification fix in the QUIC certificate verification path when using a plain X509TrustManager. The BoringSSLCertificateVerifyCallback discards the SSLEngine for plain trust managers, preventing endpoint identification from running even when HTTPS verification is configured. Attackers on the network path can present a certificate chain for the wrong hostname that the plain trust manager accepts, bypassing hostname authentication for QUIC clients.

    Published:Sep 26, 2026
    Last Modified:Oct 2, 2026
    EPS:Sep 26, 2026
    EPSS Score:0.00291
    CVSS Score:7.5

    Affected Products

    Vendor
    Netty
    Product
    Netty

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-295 Improper Certificate Validation

    Related CVEs

    CVE-2026-100666 (CVSS 6.9) — Netty's HttpServerCodec (io.netty:netty-codec-http) in versions 4.2.0.Final through 4.2.16.Final and in versio…
    CVE-2026-100664 (CVSS 8.7) — Netty's HTTP/3 codec (io.netty:netty-codec-http3) versions 4.2.2.Final through 4.2.17.Final builds the HTTP/3 …
    CVE-2026-100663 (CVSS 8.7) — Netty's HTTP/3 codec (io.netty:netty-codec-http3) from 4.2.2.Final through 4.2.17.Final does not special-case …
    CVE-2026-100662 (CVSS 8.7) — Netty's HTTP/3 codec (io.netty:netty-codec-http3) versions 4.2.0.Final through 4.2.17.Final contain an uncontr…
    CVE-2026-100661 (CVSS 8.7) — Netty's HTTP/3 codec (io.netty:netty-codec-http3) versions 4.2.0.Final through 4.2.17.Final contain a denial-o…
    CVE-2026-100660 (CVSS 8.7) — Netty's HTTP/3 codec (io.netty:netty-codec-http3) from 4.2.0.Final through 4.2.17.Final retains unbounded per-…
    CVE-2026-100658 — This CVE ID has been rejected as a duplicate.…
    CVE-2026-100659 (CVSS 6.9) — Netty's HTTP/3 codec (io.netty:netty-codec-http3) in versions 4.2.0.Final through 4.2.17.Final does not enforc…
    CVE-2026-100657 — This CVE ID has been rejected as a duplicate.…
    CVE-2026-100656 (CVSS 7.5) — This CVE ID has been rejected as a duplicate.…

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    CVE-2026-100665 — Netty (High 8.7) | CVE-DB